The poster beside the librarian's door, at 03:28, advertises an art exhibit by Emory Douglas and speaker Elaine Brown. Both were activists and artists with the Black Panther Party and are still active as of September 2018.
The armoured car sequence is re-used from the beginning of "The Treasure of C. Errol Madre".
During the armored car sequence, Max passes the Orpheum Theater (in LA) which is showing "The Illustrated Man."
The 'Washington Public Library' in the opening shot is actually the Opera House in Budapest, Hungary. The statue of the sitting figure in the bottom center of the frame is that of composer Ferenc Erkel, the 'father of Hungarian National opera'. He is largely unknown outside of Hungary.